HALOWERK kettenwerk

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "docs": "https://kette.halowerk.com/llms.txt",
  "name": "wallet_pnl",
  "error": "payment_required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "asset": "USDC",
        "version": "2",
        "eip712Domain": {
          "name": "USD Coin",
          "chainId": 8453,
          "version": "2",
          "verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
        },
        "network_name": "Base Mainnet",
        "assetTransferMethod": "eip3009"
      },
      "payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
      "amount": "12000",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "pricing": "https://kette.halowerk.com/pricing",
  "summary": "Cost basis and profit or loss per asset for one wallet, computed from on-chain transfers priced at the time they happened, with an explicit coverage figure saying how much of it is actually backed.",
  "resource": {
    "url": "https://kette.halowerk.com/wallet/pnl",
    "iconUrl": "https://kette.halowerk.com/favicon.svg",
    "mimeType": "application/json",
    "description": "Reads token movements of a wallet, prices every inflow and outflow at the time it happened, and derives cost basis, realised and unrealised profit or loss per asset. The method is stated because the result depends on it. Uncertainty is a mandatory field, not a footnote: an on-chain history knows nothing about deposits from exchanges, transfers between wallets of the same owner, or assets no price source covers. coverage_pct says which share of the movements carries a price; below sixty percent t",
    "serviceName": "HALOWERK kettenwerk"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "wallet": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E"
          },
          "type": "http",
          "method": "POST",
          "bodyType": "json"
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "properties": {
              "body": {
                "type": "object",
                "required": [
                  "wallet"
                ],
                "properties": {
                  "chains": {
                    "type": "array",
                    "items": {
                      "type": "string"
                    },
                    "maxItems": 2,
                    "description": "Chains to query. Default: base. Each chain costs time, so the cap is two."
                  },
                  "method": {
                    "enum": [
                      "fifo",
                      "lifo",
                      "average"
                    ],
                    "type": "string",
                    "default": "fifo",
                    "description": "Cost basis method. The result depends on it and it is echoed in method_used."
                  },
                  "wallet": {
                    "type": "string",
                    "description": "Wallet address, 0x followed by 40 hex characters."
                  }
                },
                "additionalProperties": false
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "POST",
                  "PUT",
                  "PATCH"
                ],
                "type": "string"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              }
            },
            "additionalProperties": false
          }
        }
      }
    }
  },
  "price_usdc": "0.012",
  "description": "Reads token movements of a wallet, prices every inflow and outflow at the time it happened, and derives cost basis, realised and unrealised profit or loss per asset. The method is stated because the result depends on it. Uncertainty is a mandatory field, not a footnote: an on-chain history knows nothing about deposits from exchanges, transfers between wallets of the same owner, or assets no price source covers. coverage_pct says which share of the movements carries a price; below sixty percent the answer is still delivered but marked as patchy, because a partial view honestly labelled is worth more than a confident wrong number. THIS IS NOT TAX ADVICE and not a tax computation - national rules decide holding periods, allowances and what counts as a disposal, and this endpoint knows none of them. Limits: transfers are read up to a cap per chain, so long histories are truncated; internal transfers of native currency are not included, only token movements; a transfer between two wallets of the same owner looks like a disposal here and inflates realised PnL - that is named in uncertainty.",
  "inputSchema": {
    "type": "object",
    "required": [
      "wallet"
    ],
    "properties": {
      "chains": {
        "type": "array",
        "items": {
          "type": "string"
        },
        "maxItems": 2,
        "description": "Chains to query. Default: base. Each chain costs time, so the cap is two."
      },
      "method": {
        "enum": [
          "fifo",
          "lifo",
          "average"
        ],
        "type": "string",
        "default": "fifo",
        "description": "Cost basis method. The result depends on it and it is echoed in method_used."
      },
      "wallet": {
        "type": "string",
        "description": "Wallet address, 0x followed by 40 hex characters."
      }
    },
    "additionalProperties": false
  },
  "price_model": "per_call",
  "x402Version": 2,
  "instructions": "Sign the accepted terms with an x402 client and repeat the request with the payment header.",
  "outputSchema": {
    "type": "object"
  },
  "payment_header": "PAYMENT-SIGNATURE",
  "capability_request": {
    "url": "https://bedarf.halowerk.com/capabilities/request",
    "cost": "free",
    "method": "POST",
    "description": "Missing a capability, or does the scope not fit? Report the need here - no payment required. Similar reports are bundled; the response returns an id you can check back on.",
    "body_example": {
      "max_price": 0.01,
      "description": "what exactly is needed",
      "requested_capability": "short label"
    }
  }
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "asset": "USDC",
      "version": "2",
      "eip712Domain": {
        "name": "USD Coin",
        "chainId": 8453,
        "version": "2",
        "verifyingContract": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
      },
      "network_name": "Base Mainnet",
      "assetTransferMethod": "eip3009"
    },
    "payTo": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E",
    "amount": "12000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 300
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "wallet": "0x2880EdfFF13100677Bf97A3CBdF3Bc34771C4E5E"
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      }
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "required": [
        "input"
      ],
      "properties": {
        "input": {
          "type": "object",
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "properties": {
            "body": {
              "type": "object",
              "required": [
                "wallet"
              ],
              "properties": {
                "chains": {
                  "type": "array",
                  "items": {
                    "type": "string"
                  },
                  "maxItems": 2,
                  "description": "Chains to query. Default: base. Each chain costs time, so the cap is two."
                },
                "method": {
                  "enum": [
                    "fifo",
                    "lifo",
                    "average"
                  ],
                  "type": "string",
                  "default": "fifo",
                  "description": "Cost basis method. The result depends on it and it is echoed in method_used."
                },
                "wallet": {
                  "type": "string",
                  "description": "Wallet address, 0x followed by 40 hex characters."
                }
              },
              "additionalProperties": false
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "POST",
                "PUT",
                "PATCH"
              ],
              "type": "string"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            }
          },
          "additionalProperties": false
        }
      }
    }
  }
}

Provenance

Seen in the source catalog

2026-08-11 09:10Z

Last indexed by Roundhouse

2026-09-10 09:00Z

Last enriched (probe, favicon, geo)

2026-09-24 00:45Z

x402 version

2

Max timeout

300s

Liveness probe

HTTP 402